systembc | f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2

General

Target

f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe
Size

234KB
MD5

32990c51bb03c767c66472ea067e6d0c
SHA1

cc1f2bc671013ca140189b2314f71bdf35af2167
SHA256

f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2
SHA512

2f7552269dcd22ab9401d77e4d6679e71814e138662b80838b913844345e390d79864929d9037f8d206643d7c82698dd6d964e96312b291c7a368e3007c67d12

Score

10^/10

systembc trojan upx

Malware Config

Extracted

Family

systembc

C2

dec15coma.com:4039

dec15coma.xyz:4039

Signatures

SystemBC
SystemBC is a proxy and remote administration tool first seen in 2019.
trojan systembc
Executes dropped EXE 1 IoCs

Processes:

jtdorax.exe

pid process

680 jtdorax.exe

pid	process
680	jtdorax.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\ProgramData\orfrsj\jtdorax.exe	upx
C:\ProgramData\orfrsj\jtdorax.exe	upx

Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

6 api.ipify.org
7 ip4.seeip.org
8 ip4.seeip.org
5 api.ipify.org
Uses Tor communications 1 TTPs
Malware can proxy its traffic through Tor for more anonymity.

Connection Proxy
T1090

flow	ioc
6	api.ipify.org
7	ip4.seeip.org
8	ip4.seeip.org
5	api.ipify.org

Drops file in Windows directory 2 IoCs

Processes:

f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe

description	ioc	process
File created	C:\Windows\Tasks\jtdorax.job	f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe
File opened for modification	C:\Windows\Tasks\jtdorax.job	f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe

pid process

1460 f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe

pid	process
1460	f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

taskeng.exe

description	pid	process	target process
PID 1636 wrote to memory of 680	1636	taskeng.exe	jtdorax.exe
PID 1636 wrote to memory of 680	1636	taskeng.exe	jtdorax.exe
PID 1636 wrote to memory of 680	1636	taskeng.exe	jtdorax.exe
PID 1636 wrote to memory of 680	1636	taskeng.exe	jtdorax.exe

C:\Users\Admin\AppData\Local\Temp\f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe
"C:\Users\Admin\AppData\Local\Temp\f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
PID:1460

C:\Windows\system32\taskeng.exe
taskeng.exe {8BE72859-8E3C-44EF-9012-2EB6BA2EC885} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Suspicious use of WriteProcessMemory
PID:1636
- C:\ProgramData\orfrsj\jtdorax.exe
  C:\ProgramData\orfrsj\jtdorax.exe start
  2⤵
  - Executes dropped EXE
  PID:680

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Connection Proxy

1

T1090

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Connection Proxy

1

T1090

Exfiltration

Impact

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Downloads

C:\ProgramData\orfrsj\jtdorax.exe

MD5
32990c51bb03c767c66472ea067e6d0c

SHA1
cc1f2bc671013ca140189b2314f71bdf35af2167

SHA256
f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2

SHA512
2f7552269dcd22ab9401d77e4d6679e71814e138662b80838b913844345e390d79864929d9037f8d206643d7c82698dd6d964e96312b291c7a368e3007c67d12

Download Submit
C:\ProgramData\orfrsj\jtdorax.exe

MD5
32990c51bb03c767c66472ea067e6d0c

SHA1
cc1f2bc671013ca140189b2314f71bdf35af2167

SHA256
f4bcf65872fdee88023c7b005e860dee157c549ee1db7e67a160091b713788f2

SHA512
2f7552269dcd22ab9401d77e4d6679e71814e138662b80838b913844345e390d79864929d9037f8d206643d7c82698dd6d964e96312b291c7a368e3007c67d12

Download Submit
memory/680-61-0x0000000000288000-0x000000000028F000-memory.dmp

Filesize
28KB

Download
memory/680-63-0x0000000000288000-0x000000000028F000-memory.dmp

Filesize
28KB

Download
memory/680-64-0x0000000000400000-0x0000000005163000-memory.dmp

Filesize
77.4MB

Download
memory/1460-54-0x00000000051F9000-0x00000000051FF000-memory.dmp

Filesize
24KB

Download
memory/1460-55-0x0000000075C41000-0x0000000075C43000-memory.dmp

Filesize
8KB

Download
memory/1460-57-0x0000000000020000-0x0000000000029000-memory.dmp

Filesize
36KB

Download
memory/1460-56-0x00000000051F9000-0x00000000051FF000-memory.dmp

Filesize
24KB

Download
memory/1460-58-0x0000000000400000-0x0000000005163000-memory.dmp

Filesize
77.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads